Removed obsolete interface.

src/main/java/org/apache/commons/math4/distribution/AbstractIntegerDistribution.java

@@ -35,7 +35,7 @@ import org.apache.commons.math4.util.FastMath;
  * from distribution to distribution.
  *
  */
-public abstract class AbstractIntegerDistribution implements IntegerDistribution, Serializable {
+public abstract class AbstractIntegerDistribution implements DiscreteDistribution, Serializable {
     /** Serializable version identifier */
     private static final long serialVersionUID = 20160318L;
 

src/main/java/org/apache/commons/math4/distribution/IntegerDistribution.java

@@ -1,24 +0,0 @@
-/*
- * Licensed to the Apache Software Foundation (ASF) under one or more
- * contributor license agreements.  See the NOTICE file distributed with
- * this work for additional information regarding copyright ownership.
- * The ASF licenses this file to You under the Apache License, Version 2.0
- * (the "License"); you may not use this file except in compliance with
- * the License.  You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-package org.apache.commons.math4.distribution;
-
-import org.apache.commons.statistics.distribution.DiscreteDistribution;
-
-/**
- * Interface for distributions on the integers.
- */
-public interface IntegerDistribution extends DiscreteDistribution {}